The IQ test scores for first - graders for the entire U.S. population has approximately a Normal
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Question:
The IQ test scores for first - graders for the entire U.S. population has approximately a Normal distribution with mean 100 and standard deviation 15. The following is a random sample of 10 scores from one school:
107
113
108
127
146
103
108
118
111
119
We are interested in seeing whether the population of first graders at this school is different from the national population. Assume that the normal distribution with standard deviation 15 is valid for the school, and test at the 0.05 level to see wither the school mean differs from the national mean. Summarize your conclusions in a sentence about these first graders.
Related Book For
Essentials of Statistics for the Behavioral Sciences
ISBN: 978-1285056340
8th Edition
Authors: Frederick J Gravetter, Larry B. Wallnau
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